US2240765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for grooving preformed sheets
Assignee: Armstrong World Industries Inc
•
Filing: 1939-06-28
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Granted: 1941-05-06
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Expires: 1959-06-28
Abstract
No abstract record available.
Inventors
- 👤 Edward L Dryer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:29
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/04; B23; B23D; B23D45/00; B23D45/10; B26; B26D; B26D3/00; B26D3/003; B26D3/06; B26D3/065; B29K; B29K2021/00; Y; Y10; Y10S; Y10S29/00; Y10S29/086; Y10S29/102; Y10S82/00; Y10S82/901; Y10T; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/306664; Y10T409/30672; Y10T409/307448; Y10T83/00; Y10T83/02; Y10T83/0304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-05-05 | 1944-11-04 | 1945-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-05 | 1948-11-04 | 1949-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-05 | 1952-11-04 | 1953-05-06 | $7700.00 | Window Closed / Lapsed |